svl/source/notify/listener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <svl/listener.hxx>
  21 #include <svl/broadcast.hxx>
  22
  23 SvtListener::~SvtListener() COVERITY_NOEXCEPT_FALSE
  24 {
  25     // Unregister itself from all broadcasters it's listening to.
  26     EndListeningAll();
  27 }
  28
  29 // registers at a specific SvtBroadcaster
  30
  31 bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
  32 {
  33     std::pair<BroadcastersType::const_iterator, bool> r =
  34         maBroadcasters.insert(&rBroadcaster);
  35     if (r.second)
  36     {
  37         // This is a new broadcaster.
  38         rBroadcaster.Add(this);
  39     }
  40     return r.second;
  41 }
  42
  43 void SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
  44 {
  45     BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
  46     if (it == maBroadcasters.end())
  47         // Not listening to this broadcaster.
  48         return;
  49     maBroadcasters.erase(it);
  50
  51     rBroadcaster.Remove(this);
  52 }
  53
  54 // called from the SvtBroadcaster destructor, used to avoid calling
  55 // back into the broadcaster again
  56 void SvtListener::BroadcasterDying( SvtBroadcaster& rBroadcaster )
  57 {
  58     BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
  59     if (it != maBroadcasters.end())
  60         maBroadcasters.erase(it);
  61 }
  62
  63 void SvtListener::EndListeningAll()
  64 {
  65     for (SvtBroadcaster* p : maBroadcasters)
  66     {
  67         SvtBroadcaster& rBC = *p;
  68         rBC.Remove(this);
  69     }
  70     maBroadcasters.clear();
  71 }
  72
  73
  74 void SvtListener::CopyAllBroadcasters( const SvtListener& r )
  75 {
  76     EndListeningAll();
  77     BroadcastersType aCopy(r.maBroadcasters);
  78     maBroadcasters.swap(aCopy);
  79     for (SvtBroadcaster* p : maBroadcasters)
  80     {
  81         p->Add(this);
  82     }
  83 }
  84
  85 void SvtListener::Notify( const SfxHint& /*rHint*/ ) {}
  86
  87 void SvtListener::Query( QueryBase& /*rQuery*/ ) const {}
  88
  89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */